NEC ND-71762(E) system manual Office Rank Source Office, Plo Act Osc

GENERAL INFORMATION FOR CCIS

5.2 Office Rank

5.2.1Source Office

The Source Office supplies clock pulses generated by the M-OSC in the self office to the PLO/OSC (High Precision Oscillator) in the self office.

Figure 2-11 shows the clock supply routes.

Figure 2-11 Clock Supply Routes

This figure shows an example of the clock supply routes when the PLO0 is in ACT side.

Two systems each

PLO 0

ACT

M-OSC 0

M-OSC 1

(PH-CK17)

/OSC 0

(PA-CK14)

32.768 MHz

8 kHz (FH)

To Switch

System side

ACT Clock

Change Synchronization

PLO 1

(PH-CK17)

/OSC 1

(PA-CK14)

Note: For 1-IMG system, the OSC (PA-CK14) card is used. For 4-IMG system, PLO (PH-CK17) card is used.

CHAPTER 2 ND-71762 (E)

Page 16

Issue 2